A lot of people are putting a massive super spinner of spintax as an article into the WYSIWYG editor. Usually this will fail as the length of the article is way to long with all the spintax in it. Please simply break the article into sections. How you do this is via shortcode. Take a couple of paragraphs and make a shortcode out of it. Then do the same with the next few paragraphs and so on until there article is broken down. Each shortcode should have a number at the end of it so when you put them in the WYSIWYG editor, they will go in order and thus, your site will build properly. Make sure that you put the H2 and all the H3's separately from the main body to ensure they build correctly.